Because it is the fifth month of the lunar calendar, it is a popular season in midsummer, commonly known as "evil month" (also known as "poisonous month"), and the Dragon Boat Festival is commonly known as "evil day", which is a traditional festival of "eliminating all kinds of pests and poisons". As May is an evil month, people have taken active preventive measures. Today, we can still find traces of exorcism and drug avoidance from many customs of the Dragon Boat Festival.
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The symbolic significance of five-color silk to ward off evil spirits and plagues is far more obvious than the actual function, because there is no specific explanation why these colors can eliminate disasters and diseases.
It can be seen that this is a magical thing with magic and symbolic significance in folk beliefs, which is obviously different from the medical functions used by mugwort, calamus and realgar in festivals, purely for the needs of folk beliefs and good luck. On the other hand, however, the five-color silk of the festival fully shows the significance of congratulations.
The custom of wearing sachets evolved from wearing colored lines. Sachet, commonly known as sachet, is also an object that people must wear during the Dragon Boat Festival. The sachet is made of cloth of various colors, and is filled with powder made of clove, vanilla, angelica dahurica, Gan Song, atractylodes macrocephala and realgar. Wearing colored thread as a rope on a child's body also serves to ward off evil spirits.